The very earlyModel of 1953 New I frame is from mid-summer 1954.
The 32 hand ejector is also a beauty which is a Transitional I frame ore 195 if it has a leaf mainspring with 6 screws or an Improved I frame 5 screw, 1st version with half rd front sight.
The Baby J is a 2nd version with ramp front sight from 1952 and probably has the smooth front sight w/o grooves.